Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
b2e1b302 | 5 | * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> |
8318d78a JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
b2e1b302 LR |
12 | /** |
13 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
14 | * |
15 | * The usual implementation is for a driver to read a device EEPROM to | |
16 | * determine which regulatory domain it should be operating under, then | |
17 | * looking up the allowable channels in a driver-local table and finally | |
18 | * registering those channels in the wiphy structure. | |
19 | * | |
b2e1b302 LR |
20 | * Another set of compliance enforcement is for drivers to use their |
21 | * own compliance limits which can be stored on the EEPROM. The host | |
22 | * driver or firmware may ensure these are used. | |
23 | * | |
24 | * In addition to all this we provide an extra layer of regulatory | |
25 | * conformance. For drivers which do not have any regulatory | |
26 | * information CRDA provides the complete regulatory solution. | |
27 | * For others it provides a community effort on further restrictions | |
28 | * to enhance compliance. | |
29 | * | |
30 | * Note: When number of rules --> infinity we will not be able to | |
31 | * index on alpha2 any more, instead we'll probably have to | |
32 | * rely on some SHA1 checksum of the regdomain for example. | |
33 | * | |
8318d78a JB |
34 | */ |
35 | #include <linux/kernel.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
b2e1b302 LR |
37 | #include <linux/list.h> |
38 | #include <linux/random.h> | |
39 | #include <linux/nl80211.h> | |
40 | #include <linux/platform_device.h> | |
b2e1b302 | 41 | #include <net/cfg80211.h> |
8318d78a | 42 | #include "core.h" |
b2e1b302 | 43 | #include "reg.h" |
3b377ea9 | 44 | #include "regdb.h" |
73d54c9e | 45 | #include "nl80211.h" |
8318d78a | 46 | |
4113f751 | 47 | #ifdef CONFIG_CFG80211_REG_DEBUG |
8271195e | 48 | #define REG_DBG_PRINT(format, args...) \ |
4113f751 | 49 | do { \ |
8271195e | 50 | printk(KERN_DEBUG format , ## args); \ |
4113f751 LR |
51 | } while (0) |
52 | #else | |
8271195e | 53 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
54 | #endif |
55 | ||
5166ccd2 | 56 | /* Receipt of information from last regulatory request */ |
f6037d09 | 57 | static struct regulatory_request *last_request; |
734366de | 58 | |
b2e1b302 LR |
59 | /* To trigger userspace events */ |
60 | static struct platform_device *reg_pdev; | |
8318d78a | 61 | |
fb1fc7ad LR |
62 | /* |
63 | * Central wireless core regulatory domains, we only need two, | |
734366de | 64 | * the current one and a world regulatory domain in case we have no |
fb1fc7ad LR |
65 | * information to give us an alpha2 |
66 | */ | |
f130347c | 67 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 68 | |
abc7381b LR |
69 | /* |
70 | * Protects static reg.c components: | |
71 | * - cfg80211_world_regdom | |
72 | * - cfg80211_regdom | |
abc7381b LR |
73 | * - last_request |
74 | */ | |
670b7f11 | 75 | static DEFINE_MUTEX(reg_mutex); |
abc7381b LR |
76 | #define assert_reg_lock() WARN_ON(!mutex_is_locked(®_mutex)) |
77 | ||
e38f8a7a | 78 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
79 | static LIST_HEAD(reg_requests_list); |
80 | static spinlock_t reg_requests_lock; | |
81 | ||
e38f8a7a LR |
82 | /* Used to queue up beacon hints for review */ |
83 | static LIST_HEAD(reg_pending_beacons); | |
84 | static spinlock_t reg_pending_beacons_lock; | |
85 | ||
86 | /* Used to keep track of processed beacon hints */ | |
87 | static LIST_HEAD(reg_beacon_list); | |
88 | ||
89 | struct reg_beacon { | |
90 | struct list_head list; | |
91 | struct ieee80211_channel chan; | |
92 | }; | |
93 | ||
734366de JB |
94 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
95 | static const struct ieee80211_regdomain world_regdom = { | |
611b6a82 | 96 | .n_reg_rules = 5, |
734366de JB |
97 | .alpha2 = "00", |
98 | .reg_rules = { | |
68798a62 LR |
99 | /* IEEE 802.11b/g, channels 1..11 */ |
100 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
611b6a82 LR |
101 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
102 | * channel fits here. */ | |
103 | REG_RULE(2467-10, 2472+10, 20, 6, 20, | |
3fc71f77 LR |
104 | NL80211_RRF_PASSIVE_SCAN | |
105 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
106 | /* IEEE 802.11 channel 14 - Only JP enables |
107 | * this and for 802.11b only */ | |
108 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
109 | NL80211_RRF_PASSIVE_SCAN | | |
110 | NL80211_RRF_NO_IBSS | | |
111 | NL80211_RRF_NO_OFDM), | |
112 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 113 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
114 | NL80211_RRF_PASSIVE_SCAN | |
115 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
116 | |
117 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
118 | ||
119 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 120 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
121 | NL80211_RRF_PASSIVE_SCAN | |
122 | NL80211_RRF_NO_IBSS), | |
734366de JB |
123 | } |
124 | }; | |
125 | ||
a3d2eaf0 JB |
126 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
127 | &world_regdom; | |
734366de | 128 | |
6ee7d330 | 129 | static char *ieee80211_regdom = "00"; |
09d989d1 | 130 | static char user_alpha2[2]; |
6ee7d330 | 131 | |
734366de JB |
132 | module_param(ieee80211_regdom, charp, 0444); |
133 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
134 | ||
734366de JB |
135 | static void reset_regdomains(void) |
136 | { | |
942b25cf JB |
137 | /* avoid freeing static information or freeing something twice */ |
138 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
139 | cfg80211_regdomain = NULL; | |
140 | if (cfg80211_world_regdom == &world_regdom) | |
141 | cfg80211_world_regdom = NULL; | |
142 | if (cfg80211_regdomain == &world_regdom) | |
143 | cfg80211_regdomain = NULL; | |
942b25cf JB |
144 | |
145 | kfree(cfg80211_regdomain); | |
146 | kfree(cfg80211_world_regdom); | |
734366de | 147 | |
a3d2eaf0 | 148 | cfg80211_world_regdom = &world_regdom; |
734366de JB |
149 | cfg80211_regdomain = NULL; |
150 | } | |
151 | ||
fb1fc7ad LR |
152 | /* |
153 | * Dynamic world regulatory domain requested by the wireless | |
154 | * core upon initialization | |
155 | */ | |
a3d2eaf0 | 156 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 157 | { |
f6037d09 | 158 | BUG_ON(!last_request); |
734366de JB |
159 | |
160 | reset_regdomains(); | |
161 | ||
162 | cfg80211_world_regdom = rd; | |
163 | cfg80211_regdomain = rd; | |
164 | } | |
734366de | 165 | |
a3d2eaf0 | 166 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
167 | { |
168 | if (!alpha2) | |
169 | return false; | |
170 | if (alpha2[0] == '0' && alpha2[1] == '0') | |
171 | return true; | |
172 | return false; | |
173 | } | |
8318d78a | 174 | |
a3d2eaf0 | 175 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
176 | { |
177 | if (!alpha2) | |
178 | return false; | |
179 | if (alpha2[0] != 0 && alpha2[1] != 0) | |
180 | return true; | |
181 | return false; | |
182 | } | |
8318d78a | 183 | |
b2e1b302 LR |
184 | static bool is_alpha_upper(char letter) |
185 | { | |
186 | /* ASCII A - Z */ | |
187 | if (letter >= 65 && letter <= 90) | |
188 | return true; | |
189 | return false; | |
190 | } | |
8318d78a | 191 | |
a3d2eaf0 | 192 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
193 | { |
194 | if (!alpha2) | |
195 | return false; | |
fb1fc7ad LR |
196 | /* |
197 | * Special case where regulatory domain was built by driver | |
198 | * but a specific alpha2 cannot be determined | |
199 | */ | |
b2e1b302 LR |
200 | if (alpha2[0] == '9' && alpha2[1] == '9') |
201 | return true; | |
202 | return false; | |
203 | } | |
8318d78a | 204 | |
3f2355cb LR |
205 | static bool is_intersected_alpha2(const char *alpha2) |
206 | { | |
207 | if (!alpha2) | |
208 | return false; | |
fb1fc7ad LR |
209 | /* |
210 | * Special case where regulatory domain is the | |
3f2355cb | 211 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
212 | * structures |
213 | */ | |
3f2355cb LR |
214 | if (alpha2[0] == '9' && alpha2[1] == '8') |
215 | return true; | |
216 | return false; | |
217 | } | |
218 | ||
a3d2eaf0 | 219 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
220 | { |
221 | if (!alpha2) | |
222 | return false; | |
223 | if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) | |
224 | return true; | |
225 | return false; | |
226 | } | |
8318d78a | 227 | |
a3d2eaf0 | 228 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
229 | { |
230 | if (!alpha2_x || !alpha2_y) | |
231 | return false; | |
232 | if (alpha2_x[0] == alpha2_y[0] && | |
233 | alpha2_x[1] == alpha2_y[1]) | |
234 | return true; | |
235 | return false; | |
236 | } | |
237 | ||
69b1572b | 238 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 239 | { |
761cf7ec LR |
240 | assert_cfg80211_lock(); |
241 | ||
b2e1b302 LR |
242 | if (!cfg80211_regdomain) |
243 | return true; | |
244 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) | |
245 | return false; | |
246 | return true; | |
247 | } | |
248 | ||
09d989d1 LR |
249 | /* |
250 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
251 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
252 | * has ever been issued. | |
253 | */ | |
254 | static bool is_user_regdom_saved(void) | |
255 | { | |
256 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
257 | return false; | |
258 | ||
259 | /* This would indicate a mistake on the design */ | |
260 | if (WARN((!is_world_regdom(user_alpha2) && | |
261 | !is_an_alpha2(user_alpha2)), | |
262 | "Unexpected user alpha2: %c%c\n", | |
263 | user_alpha2[0], | |
264 | user_alpha2[1])) | |
265 | return false; | |
266 | ||
267 | return true; | |
268 | } | |
269 | ||
3b377ea9 JL |
270 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
271 | const struct ieee80211_regdomain *src_regd) | |
272 | { | |
273 | struct ieee80211_regdomain *regd; | |
274 | int size_of_regd = 0; | |
275 | unsigned int i; | |
276 | ||
277 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
278 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
279 | ||
280 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
281 | if (!regd) | |
282 | return -ENOMEM; | |
283 | ||
284 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
285 | ||
286 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
287 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
288 | sizeof(struct ieee80211_reg_rule)); | |
289 | ||
290 | *dst_regd = regd; | |
291 | return 0; | |
292 | } | |
293 | ||
294 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
295 | struct reg_regdb_search_request { | |
296 | char alpha2[2]; | |
297 | struct list_head list; | |
298 | }; | |
299 | ||
300 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 301 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
302 | |
303 | static void reg_regdb_search(struct work_struct *work) | |
304 | { | |
305 | struct reg_regdb_search_request *request; | |
306 | const struct ieee80211_regdomain *curdom, *regdom; | |
307 | int i, r; | |
308 | ||
368d06f5 | 309 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
310 | while (!list_empty(®_regdb_search_list)) { |
311 | request = list_first_entry(®_regdb_search_list, | |
312 | struct reg_regdb_search_request, | |
313 | list); | |
314 | list_del(&request->list); | |
315 | ||
316 | for (i=0; i<reg_regdb_size; i++) { | |
317 | curdom = reg_regdb[i]; | |
318 | ||
319 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { | |
320 | r = reg_copy_regd(®dom, curdom); | |
321 | if (r) | |
322 | break; | |
3b377ea9 JL |
323 | mutex_lock(&cfg80211_mutex); |
324 | set_regdom(regdom); | |
325 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
326 | break; |
327 | } | |
328 | } | |
329 | ||
330 | kfree(request); | |
331 | } | |
368d06f5 | 332 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
333 | } |
334 | ||
335 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
336 | ||
337 | static void reg_regdb_query(const char *alpha2) | |
338 | { | |
339 | struct reg_regdb_search_request *request; | |
340 | ||
341 | if (!alpha2) | |
342 | return; | |
343 | ||
344 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
345 | if (!request) | |
346 | return; | |
347 | ||
348 | memcpy(request->alpha2, alpha2, 2); | |
349 | ||
368d06f5 | 350 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 351 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 352 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
353 | |
354 | schedule_work(®_regdb_work); | |
355 | } | |
356 | #else | |
357 | static inline void reg_regdb_query(const char *alpha2) {} | |
358 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
359 | ||
fb1fc7ad LR |
360 | /* |
361 | * This lets us keep regulatory code which is updated on a regulatory | |
362 | * basis in userspace. | |
363 | */ | |
b2e1b302 LR |
364 | static int call_crda(const char *alpha2) |
365 | { | |
366 | char country_env[9 + 2] = "COUNTRY="; | |
367 | char *envp[] = { | |
368 | country_env, | |
369 | NULL | |
370 | }; | |
371 | ||
372 | if (!is_world_regdom((char *) alpha2)) | |
373 | printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", | |
374 | alpha2[0], alpha2[1]); | |
375 | else | |
b2e1b302 LR |
376 | printk(KERN_INFO "cfg80211: Calling CRDA to update world " |
377 | "regulatory domain\n"); | |
b2e1b302 | 378 | |
3b377ea9 JL |
379 | /* query internal regulatory database (if it exists) */ |
380 | reg_regdb_query(alpha2); | |
381 | ||
b2e1b302 LR |
382 | country_env[8] = alpha2[0]; |
383 | country_env[9] = alpha2[1]; | |
384 | ||
385 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); | |
386 | } | |
387 | ||
b2e1b302 | 388 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
a3d2eaf0 | 389 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 390 | { |
61405e97 LR |
391 | assert_cfg80211_lock(); |
392 | ||
f6037d09 JB |
393 | if (!last_request) |
394 | return false; | |
395 | ||
396 | return alpha2_equal(last_request->alpha2, alpha2); | |
b2e1b302 | 397 | } |
8318d78a | 398 | |
b2e1b302 | 399 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 400 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 401 | { |
a3d2eaf0 | 402 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
403 | u32 freq_diff; |
404 | ||
91e99004 | 405 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
406 | return false; |
407 | ||
408 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
409 | return false; | |
410 | ||
411 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
412 | ||
bd05f28e RK |
413 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
414 | freq_range->max_bandwidth_khz > freq_diff) | |
b2e1b302 LR |
415 | return false; |
416 | ||
417 | return true; | |
418 | } | |
419 | ||
a3d2eaf0 | 420 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 421 | { |
a3d2eaf0 | 422 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 423 | unsigned int i; |
8318d78a | 424 | |
b2e1b302 LR |
425 | if (!rd->n_reg_rules) |
426 | return false; | |
8318d78a | 427 | |
88dc1c3f LR |
428 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
429 | return false; | |
430 | ||
b2e1b302 LR |
431 | for (i = 0; i < rd->n_reg_rules; i++) { |
432 | reg_rule = &rd->reg_rules[i]; | |
433 | if (!is_valid_reg_rule(reg_rule)) | |
434 | return false; | |
435 | } | |
436 | ||
437 | return true; | |
8318d78a JB |
438 | } |
439 | ||
038659e7 LR |
440 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
441 | u32 center_freq_khz, | |
442 | u32 bw_khz) | |
b2e1b302 | 443 | { |
038659e7 LR |
444 | u32 start_freq_khz, end_freq_khz; |
445 | ||
446 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
447 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
448 | ||
449 | if (start_freq_khz >= freq_range->start_freq_khz && | |
450 | end_freq_khz <= freq_range->end_freq_khz) | |
451 | return true; | |
452 | ||
453 | return false; | |
b2e1b302 | 454 | } |
8318d78a | 455 | |
0c7dc45d LR |
456 | /** |
457 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
458 | * @freq_range: frequency rule we want to query | |
459 | * @freq_khz: frequency we are inquiring about | |
460 | * | |
461 | * This lets us know if a specific frequency rule is or is not relevant to | |
462 | * a specific frequency's band. Bands are device specific and artificial | |
463 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is | |
464 | * safe for now to assume that a frequency rule should not be part of a | |
465 | * frequency's band if the start freq or end freq are off by more than 2 GHz. | |
466 | * This resolution can be lowered and should be considered as we add | |
467 | * regulatory rule support for other "bands". | |
468 | **/ | |
469 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
470 | u32 freq_khz) | |
471 | { | |
472 | #define ONE_GHZ_IN_KHZ 1000000 | |
473 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
474 | return true; | |
475 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
476 | return true; | |
477 | return false; | |
478 | #undef ONE_GHZ_IN_KHZ | |
479 | } | |
480 | ||
fb1fc7ad LR |
481 | /* |
482 | * Helper for regdom_intersect(), this does the real | |
483 | * mathematical intersection fun | |
484 | */ | |
9c96477d LR |
485 | static int reg_rules_intersect( |
486 | const struct ieee80211_reg_rule *rule1, | |
487 | const struct ieee80211_reg_rule *rule2, | |
488 | struct ieee80211_reg_rule *intersected_rule) | |
489 | { | |
490 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
491 | struct ieee80211_freq_range *freq_range; | |
492 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
493 | struct ieee80211_power_rule *power_rule; | |
494 | u32 freq_diff; | |
495 | ||
496 | freq_range1 = &rule1->freq_range; | |
497 | freq_range2 = &rule2->freq_range; | |
498 | freq_range = &intersected_rule->freq_range; | |
499 | ||
500 | power_rule1 = &rule1->power_rule; | |
501 | power_rule2 = &rule2->power_rule; | |
502 | power_rule = &intersected_rule->power_rule; | |
503 | ||
504 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
505 | freq_range2->start_freq_khz); | |
506 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, | |
507 | freq_range2->end_freq_khz); | |
508 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, | |
509 | freq_range2->max_bandwidth_khz); | |
510 | ||
511 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
512 | if (freq_range->max_bandwidth_khz > freq_diff) | |
513 | freq_range->max_bandwidth_khz = freq_diff; | |
514 | ||
515 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
516 | power_rule2->max_eirp); | |
517 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
518 | power_rule2->max_antenna_gain); | |
519 | ||
520 | intersected_rule->flags = (rule1->flags | rule2->flags); | |
521 | ||
522 | if (!is_valid_reg_rule(intersected_rule)) | |
523 | return -EINVAL; | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
528 | /** | |
529 | * regdom_intersect - do the intersection between two regulatory domains | |
530 | * @rd1: first regulatory domain | |
531 | * @rd2: second regulatory domain | |
532 | * | |
533 | * Use this function to get the intersection between two regulatory domains. | |
534 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
535 | * as no one single alpha2 can represent this regulatory domain. | |
536 | * | |
537 | * Returns a pointer to the regulatory domain structure which will hold the | |
538 | * resulting intersection of rules between rd1 and rd2. We will | |
539 | * kzalloc() this structure for you. | |
540 | */ | |
541 | static struct ieee80211_regdomain *regdom_intersect( | |
542 | const struct ieee80211_regdomain *rd1, | |
543 | const struct ieee80211_regdomain *rd2) | |
544 | { | |
545 | int r, size_of_regd; | |
546 | unsigned int x, y; | |
547 | unsigned int num_rules = 0, rule_idx = 0; | |
548 | const struct ieee80211_reg_rule *rule1, *rule2; | |
549 | struct ieee80211_reg_rule *intersected_rule; | |
550 | struct ieee80211_regdomain *rd; | |
551 | /* This is just a dummy holder to help us count */ | |
552 | struct ieee80211_reg_rule irule; | |
553 | ||
554 | /* Uses the stack temporarily for counter arithmetic */ | |
555 | intersected_rule = &irule; | |
556 | ||
557 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); | |
558 | ||
559 | if (!rd1 || !rd2) | |
560 | return NULL; | |
561 | ||
fb1fc7ad LR |
562 | /* |
563 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
564 | * build them. This is to so we can malloc() and free() a |
565 | * regdomain once. The reason we use reg_rules_intersect() here | |
566 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
567 | * All rules that do check out OK are valid. |
568 | */ | |
9c96477d LR |
569 | |
570 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
571 | rule1 = &rd1->reg_rules[x]; | |
572 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
573 | rule2 = &rd2->reg_rules[y]; | |
574 | if (!reg_rules_intersect(rule1, rule2, | |
575 | intersected_rule)) | |
576 | num_rules++; | |
577 | memset(intersected_rule, 0, | |
578 | sizeof(struct ieee80211_reg_rule)); | |
579 | } | |
580 | } | |
581 | ||
582 | if (!num_rules) | |
583 | return NULL; | |
584 | ||
585 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
586 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
587 | ||
588 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
589 | if (!rd) | |
590 | return NULL; | |
591 | ||
592 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
593 | rule1 = &rd1->reg_rules[x]; | |
594 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
595 | rule2 = &rd2->reg_rules[y]; | |
fb1fc7ad LR |
596 | /* |
597 | * This time around instead of using the stack lets | |
9c96477d | 598 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
599 | * a memcpy() |
600 | */ | |
9c96477d LR |
601 | intersected_rule = &rd->reg_rules[rule_idx]; |
602 | r = reg_rules_intersect(rule1, rule2, | |
603 | intersected_rule); | |
fb1fc7ad LR |
604 | /* |
605 | * No need to memset here the intersected rule here as | |
606 | * we're not using the stack anymore | |
607 | */ | |
9c96477d LR |
608 | if (r) |
609 | continue; | |
610 | rule_idx++; | |
611 | } | |
612 | } | |
613 | ||
614 | if (rule_idx != num_rules) { | |
615 | kfree(rd); | |
616 | return NULL; | |
617 | } | |
618 | ||
619 | rd->n_reg_rules = num_rules; | |
620 | rd->alpha2[0] = '9'; | |
621 | rd->alpha2[1] = '8'; | |
622 | ||
623 | return rd; | |
624 | } | |
625 | ||
fb1fc7ad LR |
626 | /* |
627 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
628 | * want to just have the channel structure use these | |
629 | */ | |
b2e1b302 LR |
630 | static u32 map_regdom_flags(u32 rd_flags) |
631 | { | |
632 | u32 channel_flags = 0; | |
633 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
634 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
635 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
636 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
637 | if (rd_flags & NL80211_RRF_DFS) | |
638 | channel_flags |= IEEE80211_CHAN_RADAR; | |
639 | return channel_flags; | |
640 | } | |
641 | ||
1fa25e41 LR |
642 | static int freq_reg_info_regd(struct wiphy *wiphy, |
643 | u32 center_freq, | |
038659e7 | 644 | u32 desired_bw_khz, |
1fa25e41 LR |
645 | const struct ieee80211_reg_rule **reg_rule, |
646 | const struct ieee80211_regdomain *custom_regd) | |
8318d78a JB |
647 | { |
648 | int i; | |
0c7dc45d | 649 | bool band_rule_found = false; |
3e0c3ff3 | 650 | const struct ieee80211_regdomain *regd; |
038659e7 LR |
651 | bool bw_fits = false; |
652 | ||
653 | if (!desired_bw_khz) | |
654 | desired_bw_khz = MHZ_TO_KHZ(20); | |
8318d78a | 655 | |
1fa25e41 | 656 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
3e0c3ff3 | 657 | |
fb1fc7ad LR |
658 | /* |
659 | * Follow the driver's regulatory domain, if present, unless a country | |
660 | * IE has been processed or a user wants to help complaince further | |
661 | */ | |
7db90f4a LR |
662 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
663 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && | |
3e0c3ff3 LR |
664 | wiphy->regd) |
665 | regd = wiphy->regd; | |
666 | ||
667 | if (!regd) | |
b2e1b302 LR |
668 | return -EINVAL; |
669 | ||
3e0c3ff3 | 670 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
671 | const struct ieee80211_reg_rule *rr; |
672 | const struct ieee80211_freq_range *fr = NULL; | |
673 | const struct ieee80211_power_rule *pr = NULL; | |
674 | ||
3e0c3ff3 | 675 | rr = ®d->reg_rules[i]; |
b2e1b302 LR |
676 | fr = &rr->freq_range; |
677 | pr = &rr->power_rule; | |
0c7dc45d | 678 | |
fb1fc7ad LR |
679 | /* |
680 | * We only need to know if one frequency rule was | |
0c7dc45d | 681 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
682 | * not overwrite it once found |
683 | */ | |
0c7dc45d LR |
684 | if (!band_rule_found) |
685 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
686 | ||
038659e7 LR |
687 | bw_fits = reg_does_bw_fit(fr, |
688 | center_freq, | |
689 | desired_bw_khz); | |
0c7dc45d | 690 | |
038659e7 | 691 | if (band_rule_found && bw_fits) { |
b2e1b302 | 692 | *reg_rule = rr; |
038659e7 | 693 | return 0; |
8318d78a JB |
694 | } |
695 | } | |
696 | ||
0c7dc45d LR |
697 | if (!band_rule_found) |
698 | return -ERANGE; | |
699 | ||
038659e7 | 700 | return -EINVAL; |
b2e1b302 LR |
701 | } |
702 | ||
038659e7 LR |
703 | int freq_reg_info(struct wiphy *wiphy, |
704 | u32 center_freq, | |
705 | u32 desired_bw_khz, | |
706 | const struct ieee80211_reg_rule **reg_rule) | |
1fa25e41 | 707 | { |
ac46d48e | 708 | assert_cfg80211_lock(); |
038659e7 LR |
709 | return freq_reg_info_regd(wiphy, |
710 | center_freq, | |
711 | desired_bw_khz, | |
712 | reg_rule, | |
713 | NULL); | |
1fa25e41 | 714 | } |
4f366c5d | 715 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 716 | |
038659e7 LR |
717 | /* |
718 | * Note that right now we assume the desired channel bandwidth | |
719 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
720 | * per channel, the primary and the extension channel). To support | |
721 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a | |
722 | * new ieee80211_channel.target_bw and re run the regulatory check | |
723 | * on the wiphy with the target_bw specified. Then we can simply use | |
724 | * that below for the desired_bw_khz below. | |
725 | */ | |
a92a3ce7 LR |
726 | static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, |
727 | unsigned int chan_idx) | |
b2e1b302 LR |
728 | { |
729 | int r; | |
038659e7 LR |
730 | u32 flags, bw_flags = 0; |
731 | u32 desired_bw_khz = MHZ_TO_KHZ(20); | |
b2e1b302 LR |
732 | const struct ieee80211_reg_rule *reg_rule = NULL; |
733 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 734 | const struct ieee80211_freq_range *freq_range = NULL; |
a92a3ce7 LR |
735 | struct ieee80211_supported_band *sband; |
736 | struct ieee80211_channel *chan; | |
fe33eb39 | 737 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 738 | |
761cf7ec LR |
739 | assert_cfg80211_lock(); |
740 | ||
806a9e39 LR |
741 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
742 | ||
a92a3ce7 LR |
743 | sband = wiphy->bands[band]; |
744 | BUG_ON(chan_idx >= sband->n_channels); | |
745 | chan = &sband->channels[chan_idx]; | |
746 | ||
747 | flags = chan->orig_flags; | |
b2e1b302 | 748 | |
038659e7 LR |
749 | r = freq_reg_info(wiphy, |
750 | MHZ_TO_KHZ(chan->center_freq), | |
751 | desired_bw_khz, | |
752 | ®_rule); | |
b2e1b302 | 753 | |
4f366c5d | 754 | if (r) |
8318d78a | 755 | return; |
8318d78a | 756 | |
b2e1b302 | 757 | power_rule = ®_rule->power_rule; |
038659e7 LR |
758 | freq_range = ®_rule->freq_range; |
759 | ||
760 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
761 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 762 | |
7db90f4a | 763 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 764 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 765 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad LR |
766 | /* |
767 | * This gaurantees the driver's requested regulatory domain | |
f976376d | 768 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
769 | * settings |
770 | */ | |
f976376d | 771 | chan->flags = chan->orig_flags = |
038659e7 | 772 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
773 | chan->max_antenna_gain = chan->orig_mag = |
774 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
f976376d LR |
775 | chan->max_power = chan->orig_mpwr = |
776 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
777 | return; | |
778 | } | |
779 | ||
038659e7 | 780 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
8318d78a | 781 | chan->max_antenna_gain = min(chan->orig_mag, |
b2e1b302 | 782 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
253898c4 | 783 | if (chan->orig_mpwr) |
b2e1b302 LR |
784 | chan->max_power = min(chan->orig_mpwr, |
785 | (int) MBM_TO_DBM(power_rule->max_eirp)); | |
253898c4 | 786 | else |
b2e1b302 | 787 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
8318d78a JB |
788 | } |
789 | ||
a92a3ce7 | 790 | static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) |
8318d78a | 791 | { |
a92a3ce7 LR |
792 | unsigned int i; |
793 | struct ieee80211_supported_band *sband; | |
794 | ||
795 | BUG_ON(!wiphy->bands[band]); | |
796 | sband = wiphy->bands[band]; | |
8318d78a JB |
797 | |
798 | for (i = 0; i < sband->n_channels; i++) | |
a92a3ce7 | 799 | handle_channel(wiphy, band, i); |
8318d78a JB |
800 | } |
801 | ||
7db90f4a LR |
802 | static bool ignore_reg_update(struct wiphy *wiphy, |
803 | enum nl80211_reg_initiator initiator) | |
14b9815a LR |
804 | { |
805 | if (!last_request) | |
806 | return true; | |
7db90f4a | 807 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
5be83de5 | 808 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
14b9815a | 809 | return true; |
fb1fc7ad LR |
810 | /* |
811 | * wiphy->regd will be set once the device has its own | |
812 | * desired regulatory domain set | |
813 | */ | |
5be83de5 | 814 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
f976376d | 815 | !is_world_regdom(last_request->alpha2)) |
14b9815a LR |
816 | return true; |
817 | return false; | |
818 | } | |
819 | ||
7db90f4a | 820 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
8318d78a | 821 | { |
79c97e97 | 822 | struct cfg80211_registered_device *rdev; |
8318d78a | 823 | |
79c97e97 JB |
824 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
825 | wiphy_update_regulatory(&rdev->wiphy, initiator); | |
b2e1b302 LR |
826 | } |
827 | ||
e38f8a7a LR |
828 | static void handle_reg_beacon(struct wiphy *wiphy, |
829 | unsigned int chan_idx, | |
830 | struct reg_beacon *reg_beacon) | |
831 | { | |
e38f8a7a LR |
832 | struct ieee80211_supported_band *sband; |
833 | struct ieee80211_channel *chan; | |
6bad8766 LR |
834 | bool channel_changed = false; |
835 | struct ieee80211_channel chan_before; | |
e38f8a7a LR |
836 | |
837 | assert_cfg80211_lock(); | |
838 | ||
839 | sband = wiphy->bands[reg_beacon->chan.band]; | |
840 | chan = &sband->channels[chan_idx]; | |
841 | ||
842 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
843 | return; | |
844 | ||
6bad8766 LR |
845 | if (chan->beacon_found) |
846 | return; | |
847 | ||
848 | chan->beacon_found = true; | |
849 | ||
5be83de5 | 850 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
851 | return; |
852 | ||
6bad8766 LR |
853 | chan_before.center_freq = chan->center_freq; |
854 | chan_before.flags = chan->flags; | |
855 | ||
37184244 | 856 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 857 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 858 | channel_changed = true; |
e38f8a7a LR |
859 | } |
860 | ||
37184244 | 861 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 862 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 863 | channel_changed = true; |
e38f8a7a LR |
864 | } |
865 | ||
6bad8766 LR |
866 | if (channel_changed) |
867 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
868 | } |
869 | ||
870 | /* | |
871 | * Called when a scan on a wiphy finds a beacon on | |
872 | * new channel | |
873 | */ | |
874 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
875 | struct reg_beacon *reg_beacon) | |
876 | { | |
877 | unsigned int i; | |
878 | struct ieee80211_supported_band *sband; | |
879 | ||
880 | assert_cfg80211_lock(); | |
881 | ||
882 | if (!wiphy->bands[reg_beacon->chan.band]) | |
883 | return; | |
884 | ||
885 | sband = wiphy->bands[reg_beacon->chan.band]; | |
886 | ||
887 | for (i = 0; i < sband->n_channels; i++) | |
888 | handle_reg_beacon(wiphy, i, reg_beacon); | |
889 | } | |
890 | ||
891 | /* | |
892 | * Called upon reg changes or a new wiphy is added | |
893 | */ | |
894 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
895 | { | |
896 | unsigned int i; | |
897 | struct ieee80211_supported_band *sband; | |
898 | struct reg_beacon *reg_beacon; | |
899 | ||
900 | assert_cfg80211_lock(); | |
901 | ||
902 | if (list_empty(®_beacon_list)) | |
903 | return; | |
904 | ||
905 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { | |
906 | if (!wiphy->bands[reg_beacon->chan.band]) | |
907 | continue; | |
908 | sband = wiphy->bands[reg_beacon->chan.band]; | |
909 | for (i = 0; i < sband->n_channels; i++) | |
910 | handle_reg_beacon(wiphy, i, reg_beacon); | |
911 | } | |
912 | } | |
913 | ||
914 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
915 | { | |
916 | if (is_world_regdom(cfg80211_regdomain->alpha2) || | |
917 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
918 | return true; | |
b1ed8ddd LR |
919 | if (last_request && |
920 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 921 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a LR |
922 | return true; |
923 | return false; | |
924 | } | |
925 | ||
926 | /* Reap the advantages of previously found beacons */ | |
927 | static void reg_process_beacons(struct wiphy *wiphy) | |
928 | { | |
b1ed8ddd LR |
929 | /* |
930 | * Means we are just firing up cfg80211, so no beacons would | |
931 | * have been processed yet. | |
932 | */ | |
933 | if (!last_request) | |
934 | return; | |
e38f8a7a LR |
935 | if (!reg_is_world_roaming(wiphy)) |
936 | return; | |
937 | wiphy_update_beacon_reg(wiphy); | |
938 | } | |
939 | ||
038659e7 LR |
940 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
941 | { | |
942 | if (!chan) | |
943 | return true; | |
944 | if (chan->flags & IEEE80211_CHAN_DISABLED) | |
945 | return true; | |
946 | /* This would happen when regulatory rules disallow HT40 completely */ | |
947 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) | |
948 | return true; | |
949 | return false; | |
950 | } | |
951 | ||
952 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
953 | enum ieee80211_band band, | |
954 | unsigned int chan_idx) | |
955 | { | |
956 | struct ieee80211_supported_band *sband; | |
957 | struct ieee80211_channel *channel; | |
958 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; | |
959 | unsigned int i; | |
960 | ||
961 | assert_cfg80211_lock(); | |
962 | ||
963 | sband = wiphy->bands[band]; | |
964 | BUG_ON(chan_idx >= sband->n_channels); | |
965 | channel = &sband->channels[chan_idx]; | |
966 | ||
967 | if (is_ht40_not_allowed(channel)) { | |
968 | channel->flags |= IEEE80211_CHAN_NO_HT40; | |
969 | return; | |
970 | } | |
971 | ||
972 | /* | |
973 | * We need to ensure the extension channels exist to | |
974 | * be able to use HT40- or HT40+, this finds them (or not) | |
975 | */ | |
976 | for (i = 0; i < sband->n_channels; i++) { | |
977 | struct ieee80211_channel *c = &sband->channels[i]; | |
978 | if (c->center_freq == (channel->center_freq - 20)) | |
979 | channel_before = c; | |
980 | if (c->center_freq == (channel->center_freq + 20)) | |
981 | channel_after = c; | |
982 | } | |
983 | ||
984 | /* | |
985 | * Please note that this assumes target bandwidth is 20 MHz, | |
986 | * if that ever changes we also need to change the below logic | |
987 | * to include that as well. | |
988 | */ | |
989 | if (is_ht40_not_allowed(channel_before)) | |
689da1b3 | 990 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 991 | else |
689da1b3 | 992 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 LR |
993 | |
994 | if (is_ht40_not_allowed(channel_after)) | |
689da1b3 | 995 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 996 | else |
689da1b3 | 997 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
998 | } |
999 | ||
1000 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
1001 | enum ieee80211_band band) | |
1002 | { | |
1003 | unsigned int i; | |
1004 | struct ieee80211_supported_band *sband; | |
1005 | ||
1006 | BUG_ON(!wiphy->bands[band]); | |
1007 | sband = wiphy->bands[band]; | |
1008 | ||
1009 | for (i = 0; i < sband->n_channels; i++) | |
1010 | reg_process_ht_flags_channel(wiphy, band, i); | |
1011 | } | |
1012 | ||
1013 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1014 | { | |
1015 | enum ieee80211_band band; | |
1016 | ||
1017 | if (!wiphy) | |
1018 | return; | |
1019 | ||
1020 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1021 | if (wiphy->bands[band]) | |
1022 | reg_process_ht_flags_band(wiphy, band); | |
1023 | } | |
1024 | ||
1025 | } | |
1026 | ||
7db90f4a LR |
1027 | void wiphy_update_regulatory(struct wiphy *wiphy, |
1028 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1029 | { |
1030 | enum ieee80211_band band; | |
d46e5b1d | 1031 | |
7db90f4a | 1032 | if (ignore_reg_update(wiphy, initiator)) |
e38f8a7a | 1033 | goto out; |
b2e1b302 | 1034 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
8318d78a | 1035 | if (wiphy->bands[band]) |
a92a3ce7 | 1036 | handle_band(wiphy, band); |
b2e1b302 | 1037 | } |
e38f8a7a LR |
1038 | out: |
1039 | reg_process_beacons(wiphy); | |
038659e7 | 1040 | reg_process_ht_flags(wiphy); |
560e28e1 | 1041 | if (wiphy->reg_notifier) |
716f9392 | 1042 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1043 | } |
1044 | ||
1fa25e41 LR |
1045 | static void handle_channel_custom(struct wiphy *wiphy, |
1046 | enum ieee80211_band band, | |
1047 | unsigned int chan_idx, | |
1048 | const struct ieee80211_regdomain *regd) | |
1049 | { | |
1050 | int r; | |
038659e7 LR |
1051 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
1052 | u32 bw_flags = 0; | |
1fa25e41 LR |
1053 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1054 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1055 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 LR |
1056 | struct ieee80211_supported_band *sband; |
1057 | struct ieee80211_channel *chan; | |
1058 | ||
abc7381b | 1059 | assert_reg_lock(); |
ac46d48e | 1060 | |
1fa25e41 LR |
1061 | sband = wiphy->bands[band]; |
1062 | BUG_ON(chan_idx >= sband->n_channels); | |
1063 | chan = &sband->channels[chan_idx]; | |
1064 | ||
038659e7 LR |
1065 | r = freq_reg_info_regd(wiphy, |
1066 | MHZ_TO_KHZ(chan->center_freq), | |
1067 | desired_bw_khz, | |
1068 | ®_rule, | |
1069 | regd); | |
1fa25e41 LR |
1070 | |
1071 | if (r) { | |
1072 | chan->flags = IEEE80211_CHAN_DISABLED; | |
1073 | return; | |
1074 | } | |
1075 | ||
1076 | power_rule = ®_rule->power_rule; | |
038659e7 LR |
1077 | freq_range = ®_rule->freq_range; |
1078 | ||
1079 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1080 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1081 | |
038659e7 | 1082 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1083 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
1fa25e41 LR |
1084 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
1085 | } | |
1086 | ||
1087 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, | |
1088 | const struct ieee80211_regdomain *regd) | |
1089 | { | |
1090 | unsigned int i; | |
1091 | struct ieee80211_supported_band *sband; | |
1092 | ||
1093 | BUG_ON(!wiphy->bands[band]); | |
1094 | sband = wiphy->bands[band]; | |
1095 | ||
1096 | for (i = 0; i < sband->n_channels; i++) | |
1097 | handle_channel_custom(wiphy, band, i, regd); | |
1098 | } | |
1099 | ||
1100 | /* Used by drivers prior to wiphy registration */ | |
1101 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1102 | const struct ieee80211_regdomain *regd) | |
1103 | { | |
1104 | enum ieee80211_band band; | |
bbcf3f02 | 1105 | unsigned int bands_set = 0; |
ac46d48e | 1106 | |
abc7381b | 1107 | mutex_lock(®_mutex); |
1fa25e41 | 1108 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1109 | if (!wiphy->bands[band]) |
1110 | continue; | |
1111 | handle_band_custom(wiphy, band, regd); | |
1112 | bands_set++; | |
b2e1b302 | 1113 | } |
abc7381b | 1114 | mutex_unlock(®_mutex); |
bbcf3f02 LR |
1115 | |
1116 | /* | |
1117 | * no point in calling this if it won't have any effect | |
1118 | * on your device's supportd bands. | |
1119 | */ | |
1120 | WARN_ON(!bands_set); | |
b2e1b302 | 1121 | } |
1fa25e41 LR |
1122 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1123 | ||
fb1fc7ad LR |
1124 | /* |
1125 | * Return value which can be used by ignore_request() to indicate | |
1126 | * it has been determined we should intersect two regulatory domains | |
1127 | */ | |
9c96477d LR |
1128 | #define REG_INTERSECT 1 |
1129 | ||
84fa4f43 JB |
1130 | /* This has the logic which determines when a new request |
1131 | * should be ignored. */ | |
2f92cd2e LR |
1132 | static int ignore_request(struct wiphy *wiphy, |
1133 | struct regulatory_request *pending_request) | |
84fa4f43 | 1134 | { |
806a9e39 | 1135 | struct wiphy *last_wiphy = NULL; |
761cf7ec LR |
1136 | |
1137 | assert_cfg80211_lock(); | |
1138 | ||
84fa4f43 JB |
1139 | /* All initial requests are respected */ |
1140 | if (!last_request) | |
1141 | return 0; | |
1142 | ||
2f92cd2e | 1143 | switch (pending_request->initiator) { |
7db90f4a | 1144 | case NL80211_REGDOM_SET_BY_CORE: |
09d989d1 | 1145 | return 0; |
7db90f4a | 1146 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
806a9e39 LR |
1147 | |
1148 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
1149 | ||
2f92cd2e | 1150 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1151 | return -EINVAL; |
7db90f4a LR |
1152 | if (last_request->initiator == |
1153 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1154 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1155 | /* |
1156 | * Two cards with two APs claiming different | |
1fe90b03 | 1157 | * Country IE alpha2s. We could |
84fa4f43 JB |
1158 | * intersect them, but that seems unlikely |
1159 | * to be correct. Reject second one for now. | |
1160 | */ | |
2f92cd2e | 1161 | if (regdom_changes(pending_request->alpha2)) |
84fa4f43 JB |
1162 | return -EOPNOTSUPP; |
1163 | return -EALREADY; | |
1164 | } | |
fb1fc7ad LR |
1165 | /* |
1166 | * Two consecutive Country IE hints on the same wiphy. | |
1167 | * This should be picked up early by the driver/stack | |
1168 | */ | |
2f92cd2e | 1169 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
84fa4f43 JB |
1170 | return 0; |
1171 | return -EALREADY; | |
1172 | } | |
3f2355cb | 1173 | return REG_INTERSECT; |
7db90f4a LR |
1174 | case NL80211_REGDOM_SET_BY_DRIVER: |
1175 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1176 | if (regdom_changes(pending_request->alpha2)) |
e74b1e7f | 1177 | return 0; |
84fa4f43 | 1178 | return -EALREADY; |
e74b1e7f | 1179 | } |
fff32c04 LR |
1180 | |
1181 | /* | |
1182 | * This would happen if you unplug and plug your card | |
1183 | * back in or if you add a new device for which the previously | |
1184 | * loaded card also agrees on the regulatory domain. | |
1185 | */ | |
7db90f4a | 1186 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1187 | !regdom_changes(pending_request->alpha2)) |
fff32c04 LR |
1188 | return -EALREADY; |
1189 | ||
3e0c3ff3 | 1190 | return REG_INTERSECT; |
7db90f4a LR |
1191 | case NL80211_REGDOM_SET_BY_USER: |
1192 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
9c96477d | 1193 | return REG_INTERSECT; |
fb1fc7ad LR |
1194 | /* |
1195 | * If the user knows better the user should set the regdom | |
1196 | * to their country before the IE is picked up | |
1197 | */ | |
7db90f4a | 1198 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
3f2355cb LR |
1199 | last_request->intersect) |
1200 | return -EOPNOTSUPP; | |
fb1fc7ad LR |
1201 | /* |
1202 | * Process user requests only after previous user/driver/core | |
1203 | * requests have been processed | |
1204 | */ | |
7db90f4a LR |
1205 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1206 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1207 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { | |
69b1572b | 1208 | if (regdom_changes(last_request->alpha2)) |
5eebade6 LR |
1209 | return -EAGAIN; |
1210 | } | |
1211 | ||
baeb66fe | 1212 | if (!regdom_changes(pending_request->alpha2)) |
e74b1e7f LR |
1213 | return -EALREADY; |
1214 | ||
84fa4f43 JB |
1215 | return 0; |
1216 | } | |
1217 | ||
1218 | return -EINVAL; | |
1219 | } | |
1220 | ||
d1c96a9a LR |
1221 | /** |
1222 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1223 | * @wiphy: if the hint comes from country information from an AP, this | |
1224 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1225 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1226 | * |
1227 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1228 | * what it believes should be the current regulatory domain. |
d1c96a9a LR |
1229 | * |
1230 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had | |
1231 | * already been set or other standard error codes. | |
1232 | * | |
abc7381b | 1233 | * Caller must hold &cfg80211_mutex and ®_mutex |
d1c96a9a | 1234 | */ |
28da32d7 LR |
1235 | static int __regulatory_hint(struct wiphy *wiphy, |
1236 | struct regulatory_request *pending_request) | |
b2e1b302 | 1237 | { |
9c96477d | 1238 | bool intersect = false; |
b2e1b302 LR |
1239 | int r = 0; |
1240 | ||
761cf7ec LR |
1241 | assert_cfg80211_lock(); |
1242 | ||
2f92cd2e | 1243 | r = ignore_request(wiphy, pending_request); |
9c96477d | 1244 | |
3e0c3ff3 | 1245 | if (r == REG_INTERSECT) { |
7db90f4a LR |
1246 | if (pending_request->initiator == |
1247 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1248 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1249 | if (r) { |
1250 | kfree(pending_request); | |
3e0c3ff3 | 1251 | return r; |
d951c1dd | 1252 | } |
3e0c3ff3 | 1253 | } |
9c96477d | 1254 | intersect = true; |
3e0c3ff3 | 1255 | } else if (r) { |
fb1fc7ad LR |
1256 | /* |
1257 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1258 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1259 | * wiphy |
1260 | */ | |
28da32d7 | 1261 | if (r == -EALREADY && |
7db90f4a LR |
1262 | pending_request->initiator == |
1263 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1264 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1265 | if (r) { |
1266 | kfree(pending_request); | |
3e0c3ff3 | 1267 | return r; |
d951c1dd | 1268 | } |
3e0c3ff3 LR |
1269 | r = -EALREADY; |
1270 | goto new_request; | |
1271 | } | |
d951c1dd | 1272 | kfree(pending_request); |
b2e1b302 | 1273 | return r; |
3e0c3ff3 | 1274 | } |
b2e1b302 | 1275 | |
3e0c3ff3 | 1276 | new_request: |
d951c1dd | 1277 | kfree(last_request); |
5203cdb6 | 1278 | |
d951c1dd LR |
1279 | last_request = pending_request; |
1280 | last_request->intersect = intersect; | |
5203cdb6 | 1281 | |
d951c1dd | 1282 | pending_request = NULL; |
3e0c3ff3 | 1283 | |
09d989d1 LR |
1284 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
1285 | user_alpha2[0] = last_request->alpha2[0]; | |
1286 | user_alpha2[1] = last_request->alpha2[1]; | |
1287 | } | |
1288 | ||
3e0c3ff3 | 1289 | /* When r == REG_INTERSECT we do need to call CRDA */ |
73d54c9e LR |
1290 | if (r < 0) { |
1291 | /* | |
1292 | * Since CRDA will not be called in this case as we already | |
1293 | * have applied the requested regulatory domain before we just | |
1294 | * inform userspace we have processed the request | |
1295 | */ | |
1296 | if (r == -EALREADY) | |
1297 | nl80211_send_reg_change_event(last_request); | |
3e0c3ff3 | 1298 | return r; |
73d54c9e | 1299 | } |
3e0c3ff3 | 1300 | |
d951c1dd | 1301 | return call_crda(last_request->alpha2); |
b2e1b302 LR |
1302 | } |
1303 | ||
30a548c7 | 1304 | /* This processes *all* regulatory hints */ |
d951c1dd | 1305 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 LR |
1306 | { |
1307 | int r = 0; | |
1308 | struct wiphy *wiphy = NULL; | |
1309 | ||
1310 | BUG_ON(!reg_request->alpha2); | |
1311 | ||
1312 | mutex_lock(&cfg80211_mutex); | |
abc7381b | 1313 | mutex_lock(®_mutex); |
fe33eb39 LR |
1314 | |
1315 | if (wiphy_idx_valid(reg_request->wiphy_idx)) | |
1316 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); | |
1317 | ||
7db90f4a | 1318 | if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
fe33eb39 | 1319 | !wiphy) { |
d951c1dd | 1320 | kfree(reg_request); |
fe33eb39 LR |
1321 | goto out; |
1322 | } | |
1323 | ||
28da32d7 | 1324 | r = __regulatory_hint(wiphy, reg_request); |
fe33eb39 | 1325 | /* This is required so that the orig_* parameters are saved */ |
5be83de5 JB |
1326 | if (r == -EALREADY && wiphy && |
1327 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
fe33eb39 LR |
1328 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
1329 | out: | |
abc7381b | 1330 | mutex_unlock(®_mutex); |
fe33eb39 | 1331 | mutex_unlock(&cfg80211_mutex); |
fe33eb39 LR |
1332 | } |
1333 | ||
7db90f4a | 1334 | /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ |
fe33eb39 LR |
1335 | static void reg_process_pending_hints(void) |
1336 | { | |
1337 | struct regulatory_request *reg_request; | |
fe33eb39 LR |
1338 | |
1339 | spin_lock(®_requests_lock); | |
1340 | while (!list_empty(®_requests_list)) { | |
1341 | reg_request = list_first_entry(®_requests_list, | |
1342 | struct regulatory_request, | |
1343 | list); | |
1344 | list_del_init(®_request->list); | |
fe33eb39 | 1345 | |
d951c1dd LR |
1346 | spin_unlock(®_requests_lock); |
1347 | reg_process_hint(reg_request); | |
fe33eb39 LR |
1348 | spin_lock(®_requests_lock); |
1349 | } | |
1350 | spin_unlock(®_requests_lock); | |
1351 | } | |
1352 | ||
e38f8a7a LR |
1353 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1354 | static void reg_process_pending_beacon_hints(void) | |
1355 | { | |
79c97e97 | 1356 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1357 | struct reg_beacon *pending_beacon, *tmp; |
1358 | ||
abc7381b LR |
1359 | /* |
1360 | * No need to hold the reg_mutex here as we just touch wiphys | |
1361 | * and do not read or access regulatory variables. | |
1362 | */ | |
e38f8a7a LR |
1363 | mutex_lock(&cfg80211_mutex); |
1364 | ||
1365 | /* This goes through the _pending_ beacon list */ | |
1366 | spin_lock_bh(®_pending_beacons_lock); | |
1367 | ||
1368 | if (list_empty(®_pending_beacons)) { | |
1369 | spin_unlock_bh(®_pending_beacons_lock); | |
1370 | goto out; | |
1371 | } | |
1372 | ||
1373 | list_for_each_entry_safe(pending_beacon, tmp, | |
1374 | ®_pending_beacons, list) { | |
1375 | ||
1376 | list_del_init(&pending_beacon->list); | |
1377 | ||
1378 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1379 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1380 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1381 | |
1382 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1383 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1384 | } | |
1385 | ||
1386 | spin_unlock_bh(®_pending_beacons_lock); | |
1387 | out: | |
1388 | mutex_unlock(&cfg80211_mutex); | |
1389 | } | |
1390 | ||
fe33eb39 LR |
1391 | static void reg_todo(struct work_struct *work) |
1392 | { | |
1393 | reg_process_pending_hints(); | |
e38f8a7a | 1394 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1395 | } |
1396 | ||
1397 | static DECLARE_WORK(reg_work, reg_todo); | |
1398 | ||
1399 | static void queue_regulatory_request(struct regulatory_request *request) | |
1400 | { | |
1401 | spin_lock(®_requests_lock); | |
1402 | list_add_tail(&request->list, ®_requests_list); | |
1403 | spin_unlock(®_requests_lock); | |
1404 | ||
1405 | schedule_work(®_work); | |
1406 | } | |
1407 | ||
09d989d1 LR |
1408 | /* |
1409 | * Core regulatory hint -- happens during cfg80211_init() | |
1410 | * and when we restore regulatory settings. | |
1411 | */ | |
ba25c141 LR |
1412 | static int regulatory_hint_core(const char *alpha2) |
1413 | { | |
1414 | struct regulatory_request *request; | |
1415 | ||
09d989d1 LR |
1416 | kfree(last_request); |
1417 | last_request = NULL; | |
ba25c141 LR |
1418 | |
1419 | request = kzalloc(sizeof(struct regulatory_request), | |
1420 | GFP_KERNEL); | |
1421 | if (!request) | |
1422 | return -ENOMEM; | |
1423 | ||
1424 | request->alpha2[0] = alpha2[0]; | |
1425 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1426 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1427 | |
5078b2e3 LR |
1428 | /* |
1429 | * This ensures last_request is populated once modules | |
1430 | * come swinging in and calling regulatory hints and | |
1431 | * wiphy_apply_custom_regulatory(). | |
1432 | */ | |
a2bff269 | 1433 | reg_process_hint(request); |
5078b2e3 | 1434 | |
fe33eb39 | 1435 | return 0; |
ba25c141 LR |
1436 | } |
1437 | ||
fe33eb39 LR |
1438 | /* User hints */ |
1439 | int regulatory_hint_user(const char *alpha2) | |
b2e1b302 | 1440 | { |
fe33eb39 LR |
1441 | struct regulatory_request *request; |
1442 | ||
be3d4810 | 1443 | BUG_ON(!alpha2); |
b2e1b302 | 1444 | |
fe33eb39 LR |
1445 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1446 | if (!request) | |
1447 | return -ENOMEM; | |
1448 | ||
1449 | request->wiphy_idx = WIPHY_IDX_STALE; | |
1450 | request->alpha2[0] = alpha2[0]; | |
1451 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1452 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
fe33eb39 LR |
1453 | |
1454 | queue_regulatory_request(request); | |
1455 | ||
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | /* Driver hints */ | |
1460 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1461 | { | |
1462 | struct regulatory_request *request; | |
1463 | ||
1464 | BUG_ON(!alpha2); | |
1465 | BUG_ON(!wiphy); | |
1466 | ||
1467 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1468 | if (!request) | |
1469 | return -ENOMEM; | |
1470 | ||
1471 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1472 | ||
1473 | /* Must have registered wiphy first */ | |
1474 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); | |
1475 | ||
1476 | request->alpha2[0] = alpha2[0]; | |
1477 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1478 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1479 | |
1480 | queue_regulatory_request(request); | |
1481 | ||
1482 | return 0; | |
b2e1b302 LR |
1483 | } |
1484 | EXPORT_SYMBOL(regulatory_hint); | |
1485 | ||
4b44c8bc LR |
1486 | /* |
1487 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1488 | * therefore cannot iterate over the rdev list here. | |
1489 | */ | |
3f2355cb | 1490 | void regulatory_hint_11d(struct wiphy *wiphy, |
84920e3e LR |
1491 | enum ieee80211_band band, |
1492 | u8 *country_ie, | |
1493 | u8 country_ie_len) | |
3f2355cb | 1494 | { |
3f2355cb | 1495 | char alpha2[2]; |
3f2355cb | 1496 | enum environment_cap env = ENVIRON_ANY; |
fe33eb39 | 1497 | struct regulatory_request *request; |
3f2355cb | 1498 | |
abc7381b | 1499 | mutex_lock(®_mutex); |
3f2355cb | 1500 | |
9828b017 LR |
1501 | if (unlikely(!last_request)) |
1502 | goto out; | |
d335fe63 | 1503 | |
3f2355cb LR |
1504 | /* IE len must be evenly divisible by 2 */ |
1505 | if (country_ie_len & 0x01) | |
1506 | goto out; | |
1507 | ||
1508 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1509 | goto out; | |
1510 | ||
3f2355cb LR |
1511 | alpha2[0] = country_ie[0]; |
1512 | alpha2[1] = country_ie[1]; | |
1513 | ||
1514 | if (country_ie[2] == 'I') | |
1515 | env = ENVIRON_INDOOR; | |
1516 | else if (country_ie[2] == 'O') | |
1517 | env = ENVIRON_OUTDOOR; | |
1518 | ||
fb1fc7ad | 1519 | /* |
8b19e6ca | 1520 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1521 | * We leave conflict resolution to the workqueue, where can hold |
1522 | * cfg80211_mutex. | |
fb1fc7ad | 1523 | */ |
cc0b6fe8 LR |
1524 | if (likely(last_request->initiator == |
1525 | NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
4b44c8bc LR |
1526 | wiphy_idx_valid(last_request->wiphy_idx))) |
1527 | goto out; | |
3f2355cb | 1528 | |
fe33eb39 LR |
1529 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1530 | if (!request) | |
f9f9b6e3 | 1531 | goto out; |
fe33eb39 | 1532 | |
fe33eb39 | 1533 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1534 | request->alpha2[0] = alpha2[0]; |
1535 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1536 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1537 | request->country_ie_env = env; |
1538 | ||
abc7381b | 1539 | mutex_unlock(®_mutex); |
3f2355cb | 1540 | |
fe33eb39 LR |
1541 | queue_regulatory_request(request); |
1542 | ||
1543 | return; | |
0441d6ff | 1544 | |
3f2355cb | 1545 | out: |
abc7381b | 1546 | mutex_unlock(®_mutex); |
3f2355cb | 1547 | } |
b2e1b302 | 1548 | |
09d989d1 LR |
1549 | static void restore_alpha2(char *alpha2, bool reset_user) |
1550 | { | |
1551 | /* indicates there is no alpha2 to consider for restoration */ | |
1552 | alpha2[0] = '9'; | |
1553 | alpha2[1] = '7'; | |
1554 | ||
1555 | /* The user setting has precedence over the module parameter */ | |
1556 | if (is_user_regdom_saved()) { | |
1557 | /* Unless we're asked to ignore it and reset it */ | |
1558 | if (reset_user) { | |
1559 | REG_DBG_PRINT("cfg80211: Restoring regulatory settings " | |
1560 | "including user preference\n"); | |
1561 | user_alpha2[0] = '9'; | |
1562 | user_alpha2[1] = '7'; | |
1563 | ||
1564 | /* | |
1565 | * If we're ignoring user settings, we still need to | |
1566 | * check the module parameter to ensure we put things | |
1567 | * back as they were for a full restore. | |
1568 | */ | |
1569 | if (!is_world_regdom(ieee80211_regdom)) { | |
1570 | REG_DBG_PRINT("cfg80211: Keeping preference on " | |
1571 | "module parameter ieee80211_regdom: %c%c\n", | |
1572 | ieee80211_regdom[0], | |
1573 | ieee80211_regdom[1]); | |
1574 | alpha2[0] = ieee80211_regdom[0]; | |
1575 | alpha2[1] = ieee80211_regdom[1]; | |
1576 | } | |
1577 | } else { | |
1578 | REG_DBG_PRINT("cfg80211: Restoring regulatory settings " | |
1579 | "while preserving user preference for: %c%c\n", | |
1580 | user_alpha2[0], | |
1581 | user_alpha2[1]); | |
1582 | alpha2[0] = user_alpha2[0]; | |
1583 | alpha2[1] = user_alpha2[1]; | |
1584 | } | |
1585 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1586 | REG_DBG_PRINT("cfg80211: Keeping preference on " | |
1587 | "module parameter ieee80211_regdom: %c%c\n", | |
1588 | ieee80211_regdom[0], | |
1589 | ieee80211_regdom[1]); | |
1590 | alpha2[0] = ieee80211_regdom[0]; | |
1591 | alpha2[1] = ieee80211_regdom[1]; | |
1592 | } else | |
1593 | REG_DBG_PRINT("cfg80211: Restoring regulatory settings\n"); | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * Restoring regulatory settings involves ingoring any | |
1598 | * possibly stale country IE information and user regulatory | |
1599 | * settings if so desired, this includes any beacon hints | |
1600 | * learned as we could have traveled outside to another country | |
1601 | * after disconnection. To restore regulatory settings we do | |
1602 | * exactly what we did at bootup: | |
1603 | * | |
1604 | * - send a core regulatory hint | |
1605 | * - send a user regulatory hint if applicable | |
1606 | * | |
1607 | * Device drivers that send a regulatory hint for a specific country | |
1608 | * keep their own regulatory domain on wiphy->regd so that does does | |
1609 | * not need to be remembered. | |
1610 | */ | |
1611 | static void restore_regulatory_settings(bool reset_user) | |
1612 | { | |
1613 | char alpha2[2]; | |
1614 | struct reg_beacon *reg_beacon, *btmp; | |
1615 | ||
1616 | mutex_lock(&cfg80211_mutex); | |
1617 | mutex_lock(®_mutex); | |
1618 | ||
1619 | reset_regdomains(); | |
1620 | restore_alpha2(alpha2, reset_user); | |
1621 | ||
1622 | /* Clear beacon hints */ | |
1623 | spin_lock_bh(®_pending_beacons_lock); | |
1624 | if (!list_empty(®_pending_beacons)) { | |
1625 | list_for_each_entry_safe(reg_beacon, btmp, | |
1626 | ®_pending_beacons, list) { | |
1627 | list_del(®_beacon->list); | |
1628 | kfree(reg_beacon); | |
1629 | } | |
1630 | } | |
1631 | spin_unlock_bh(®_pending_beacons_lock); | |
1632 | ||
1633 | if (!list_empty(®_beacon_list)) { | |
1634 | list_for_each_entry_safe(reg_beacon, btmp, | |
1635 | ®_beacon_list, list) { | |
1636 | list_del(®_beacon->list); | |
1637 | kfree(reg_beacon); | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | /* First restore to the basic regulatory settings */ | |
1642 | cfg80211_regdomain = cfg80211_world_regdom; | |
1643 | ||
1644 | mutex_unlock(®_mutex); | |
1645 | mutex_unlock(&cfg80211_mutex); | |
1646 | ||
1647 | regulatory_hint_core(cfg80211_regdomain->alpha2); | |
1648 | ||
1649 | /* | |
1650 | * This restores the ieee80211_regdom module parameter | |
1651 | * preference or the last user requested regulatory | |
1652 | * settings, user regulatory settings takes precedence. | |
1653 | */ | |
1654 | if (is_an_alpha2(alpha2)) | |
1655 | regulatory_hint_user(user_alpha2); | |
1656 | } | |
1657 | ||
1658 | ||
1659 | void regulatory_hint_disconnect(void) | |
1660 | { | |
1661 | REG_DBG_PRINT("cfg80211: All devices are disconnected, going to " | |
1662 | "restore regulatory settings\n"); | |
1663 | restore_regulatory_settings(false); | |
1664 | } | |
1665 | ||
e38f8a7a LR |
1666 | static bool freq_is_chan_12_13_14(u16 freq) |
1667 | { | |
1668 | if (freq == ieee80211_channel_to_frequency(12) || | |
1669 | freq == ieee80211_channel_to_frequency(13) || | |
1670 | freq == ieee80211_channel_to_frequency(14)) | |
1671 | return true; | |
1672 | return false; | |
1673 | } | |
1674 | ||
1675 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
1676 | struct ieee80211_channel *beacon_chan, | |
1677 | gfp_t gfp) | |
1678 | { | |
1679 | struct reg_beacon *reg_beacon; | |
1680 | ||
1681 | if (likely((beacon_chan->beacon_found || | |
1682 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || | |
1683 | (beacon_chan->band == IEEE80211_BAND_2GHZ && | |
1684 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) | |
1685 | return 0; | |
1686 | ||
1687 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1688 | if (!reg_beacon) | |
1689 | return -ENOMEM; | |
1690 | ||
4113f751 LR |
1691 | REG_DBG_PRINT("cfg80211: Found new beacon on " |
1692 | "frequency: %d MHz (Ch %d) on %s\n", | |
1693 | beacon_chan->center_freq, | |
1694 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1695 | wiphy_name(wiphy)); | |
1696 | ||
e38f8a7a LR |
1697 | memcpy(®_beacon->chan, beacon_chan, |
1698 | sizeof(struct ieee80211_channel)); | |
1699 | ||
1700 | ||
1701 | /* | |
1702 | * Since we can be called from BH or and non-BH context | |
1703 | * we must use spin_lock_bh() | |
1704 | */ | |
1705 | spin_lock_bh(®_pending_beacons_lock); | |
1706 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1707 | spin_unlock_bh(®_pending_beacons_lock); | |
1708 | ||
1709 | schedule_work(®_work); | |
1710 | ||
1711 | return 0; | |
1712 | } | |
1713 | ||
a3d2eaf0 | 1714 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1715 | { |
1716 | unsigned int i; | |
a3d2eaf0 JB |
1717 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1718 | const struct ieee80211_freq_range *freq_range = NULL; | |
1719 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 1720 | |
269ac5fd | 1721 | printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " |
b2e1b302 LR |
1722 | "(max_antenna_gain, max_eirp)\n"); |
1723 | ||
1724 | for (i = 0; i < rd->n_reg_rules; i++) { | |
1725 | reg_rule = &rd->reg_rules[i]; | |
1726 | freq_range = ®_rule->freq_range; | |
1727 | power_rule = ®_rule->power_rule; | |
1728 | ||
fb1fc7ad LR |
1729 | /* |
1730 | * There may not be documentation for max antenna gain | |
1731 | * in certain regions | |
1732 | */ | |
b2e1b302 | 1733 | if (power_rule->max_antenna_gain) |
269ac5fd | 1734 | printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " |
b2e1b302 LR |
1735 | "(%d mBi, %d mBm)\n", |
1736 | freq_range->start_freq_khz, | |
1737 | freq_range->end_freq_khz, | |
1738 | freq_range->max_bandwidth_khz, | |
1739 | power_rule->max_antenna_gain, | |
1740 | power_rule->max_eirp); | |
1741 | else | |
269ac5fd | 1742 | printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " |
b2e1b302 LR |
1743 | "(N/A, %d mBm)\n", |
1744 | freq_range->start_freq_khz, | |
1745 | freq_range->end_freq_khz, | |
1746 | freq_range->max_bandwidth_khz, | |
1747 | power_rule->max_eirp); | |
1748 | } | |
1749 | } | |
1750 | ||
a3d2eaf0 | 1751 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1752 | { |
1753 | ||
3f2355cb | 1754 | if (is_intersected_alpha2(rd->alpha2)) { |
3f2355cb | 1755 | |
7db90f4a LR |
1756 | if (last_request->initiator == |
1757 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
1758 | struct cfg80211_registered_device *rdev; |
1759 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 1760 | last_request->wiphy_idx); |
79c97e97 | 1761 | if (rdev) { |
3f2355cb LR |
1762 | printk(KERN_INFO "cfg80211: Current regulatory " |
1763 | "domain updated by AP to: %c%c\n", | |
79c97e97 JB |
1764 | rdev->country_ie_alpha2[0], |
1765 | rdev->country_ie_alpha2[1]); | |
3f2355cb LR |
1766 | } else |
1767 | printk(KERN_INFO "cfg80211: Current regulatory " | |
55f98938 | 1768 | "domain intersected:\n"); |
3f2355cb | 1769 | } else |
55f98938 FP |
1770 | printk(KERN_INFO "cfg80211: Current regulatory " |
1771 | "domain intersected:\n"); | |
3f2355cb | 1772 | } else if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
1773 | printk(KERN_INFO "cfg80211: World regulatory " |
1774 | "domain updated:\n"); | |
1775 | else { | |
1776 | if (is_unknown_alpha2(rd->alpha2)) | |
1777 | printk(KERN_INFO "cfg80211: Regulatory domain " | |
1778 | "changed to driver built-in settings " | |
1779 | "(unknown country)\n"); | |
1780 | else | |
1781 | printk(KERN_INFO "cfg80211: Regulatory domain " | |
1782 | "changed to country: %c%c\n", | |
1783 | rd->alpha2[0], rd->alpha2[1]); | |
1784 | } | |
1785 | print_rd_rules(rd); | |
1786 | } | |
1787 | ||
2df78167 | 1788 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1789 | { |
1790 | printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", | |
1791 | rd->alpha2[0], rd->alpha2[1]); | |
1792 | print_rd_rules(rd); | |
1793 | } | |
1794 | ||
d2372b31 | 1795 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 1796 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 1797 | { |
9c96477d | 1798 | const struct ieee80211_regdomain *intersected_rd = NULL; |
79c97e97 | 1799 | struct cfg80211_registered_device *rdev = NULL; |
806a9e39 | 1800 | struct wiphy *request_wiphy; |
b2e1b302 LR |
1801 | /* Some basic sanity checks first */ |
1802 | ||
b2e1b302 | 1803 | if (is_world_regdom(rd->alpha2)) { |
f6037d09 | 1804 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
1805 | return -EINVAL; |
1806 | update_world_regdomain(rd); | |
1807 | return 0; | |
1808 | } | |
b2e1b302 LR |
1809 | |
1810 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1811 | !is_unknown_alpha2(rd->alpha2)) | |
1812 | return -EINVAL; | |
1813 | ||
f6037d09 | 1814 | if (!last_request) |
b2e1b302 LR |
1815 | return -EINVAL; |
1816 | ||
fb1fc7ad LR |
1817 | /* |
1818 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 1819 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
1820 | * and the pending request came in from a country IE |
1821 | */ | |
7db90f4a | 1822 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
1823 | /* |
1824 | * If someone else asked us to change the rd lets only bother | |
1825 | * checking if the alpha2 changes if CRDA was already called | |
1826 | */ | |
baeb66fe | 1827 | if (!regdom_changes(rd->alpha2)) |
3f2355cb LR |
1828 | return -EINVAL; |
1829 | } | |
1830 | ||
fb1fc7ad LR |
1831 | /* |
1832 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
1833 | * and finally inform them of what we have done, in case they want |
1834 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
1835 | * internal EEPROM data |
1836 | */ | |
b2e1b302 | 1837 | |
f6037d09 | 1838 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
1839 | return -EINVAL; |
1840 | ||
8375af3b LR |
1841 | if (!is_valid_rd(rd)) { |
1842 | printk(KERN_ERR "cfg80211: Invalid " | |
1843 | "regulatory domain detected:\n"); | |
1844 | print_regdomain_info(rd); | |
1845 | return -EINVAL; | |
b2e1b302 LR |
1846 | } |
1847 | ||
806a9e39 LR |
1848 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1849 | ||
b8295acd | 1850 | if (!last_request->intersect) { |
3e0c3ff3 LR |
1851 | int r; |
1852 | ||
7db90f4a | 1853 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
3e0c3ff3 LR |
1854 | reset_regdomains(); |
1855 | cfg80211_regdomain = rd; | |
1856 | return 0; | |
1857 | } | |
1858 | ||
fb1fc7ad LR |
1859 | /* |
1860 | * For a driver hint, lets copy the regulatory domain the | |
1861 | * driver wanted to the wiphy to deal with conflicts | |
1862 | */ | |
3e0c3ff3 | 1863 | |
558f6d32 LR |
1864 | /* |
1865 | * Userspace could have sent two replies with only | |
1866 | * one kernel request. | |
1867 | */ | |
1868 | if (request_wiphy->regd) | |
1869 | return -EALREADY; | |
3e0c3ff3 | 1870 | |
806a9e39 | 1871 | r = reg_copy_regd(&request_wiphy->regd, rd); |
3e0c3ff3 LR |
1872 | if (r) |
1873 | return r; | |
1874 | ||
b8295acd LR |
1875 | reset_regdomains(); |
1876 | cfg80211_regdomain = rd; | |
1877 | return 0; | |
1878 | } | |
1879 | ||
1880 | /* Intersection requires a bit more work */ | |
1881 | ||
7db90f4a | 1882 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
b8295acd | 1883 | |
9c96477d LR |
1884 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
1885 | if (!intersected_rd) | |
1886 | return -EINVAL; | |
b8295acd | 1887 | |
fb1fc7ad LR |
1888 | /* |
1889 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 1890 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
1891 | * domain we keep it for its private use |
1892 | */ | |
7db90f4a | 1893 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
806a9e39 | 1894 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
1895 | else |
1896 | kfree(rd); | |
1897 | ||
b8295acd LR |
1898 | rd = NULL; |
1899 | ||
1900 | reset_regdomains(); | |
1901 | cfg80211_regdomain = intersected_rd; | |
1902 | ||
1903 | return 0; | |
9c96477d LR |
1904 | } |
1905 | ||
3f2355cb LR |
1906 | if (!intersected_rd) |
1907 | return -EINVAL; | |
1908 | ||
79c97e97 | 1909 | rdev = wiphy_to_dev(request_wiphy); |
3f2355cb | 1910 | |
79c97e97 JB |
1911 | rdev->country_ie_alpha2[0] = rd->alpha2[0]; |
1912 | rdev->country_ie_alpha2[1] = rd->alpha2[1]; | |
1913 | rdev->env = last_request->country_ie_env; | |
3f2355cb LR |
1914 | |
1915 | BUG_ON(intersected_rd == rd); | |
1916 | ||
1917 | kfree(rd); | |
1918 | rd = NULL; | |
1919 | ||
b8295acd | 1920 | reset_regdomains(); |
3f2355cb | 1921 | cfg80211_regdomain = intersected_rd; |
b2e1b302 LR |
1922 | |
1923 | return 0; | |
1924 | } | |
1925 | ||
1926 | ||
fb1fc7ad LR |
1927 | /* |
1928 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 1929 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
1930 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
1931 | */ | |
a3d2eaf0 | 1932 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 1933 | { |
b2e1b302 LR |
1934 | int r; |
1935 | ||
761cf7ec LR |
1936 | assert_cfg80211_lock(); |
1937 | ||
abc7381b LR |
1938 | mutex_lock(®_mutex); |
1939 | ||
b2e1b302 LR |
1940 | /* Note that this doesn't update the wiphys, this is done below */ |
1941 | r = __set_regdom(rd); | |
d2372b31 JB |
1942 | if (r) { |
1943 | kfree(rd); | |
abc7381b | 1944 | mutex_unlock(®_mutex); |
b2e1b302 | 1945 | return r; |
d2372b31 | 1946 | } |
b2e1b302 | 1947 | |
b2e1b302 | 1948 | /* This would make this whole thing pointless */ |
a01ddafd LR |
1949 | if (!last_request->intersect) |
1950 | BUG_ON(rd != cfg80211_regdomain); | |
b2e1b302 LR |
1951 | |
1952 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 1953 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 1954 | |
a01ddafd | 1955 | print_regdomain(cfg80211_regdomain); |
b2e1b302 | 1956 | |
73d54c9e LR |
1957 | nl80211_send_reg_change_event(last_request); |
1958 | ||
abc7381b LR |
1959 | mutex_unlock(®_mutex); |
1960 | ||
b2e1b302 LR |
1961 | return r; |
1962 | } | |
1963 | ||
a1794390 | 1964 | /* Caller must hold cfg80211_mutex */ |
3f2355cb LR |
1965 | void reg_device_remove(struct wiphy *wiphy) |
1966 | { | |
0ad8acaf | 1967 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 1968 | |
761cf7ec LR |
1969 | assert_cfg80211_lock(); |
1970 | ||
abc7381b LR |
1971 | mutex_lock(®_mutex); |
1972 | ||
0ef9ccdd CW |
1973 | kfree(wiphy->regd); |
1974 | ||
0ad8acaf LR |
1975 | if (last_request) |
1976 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 1977 | |
0ef9ccdd | 1978 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 1979 | goto out; |
0ef9ccdd | 1980 | |
806a9e39 | 1981 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
3f2355cb | 1982 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
1983 | out: |
1984 | mutex_unlock(®_mutex); | |
3f2355cb LR |
1985 | } |
1986 | ||
2fcc9f73 | 1987 | int __init regulatory_init(void) |
b2e1b302 | 1988 | { |
bcf4f99b | 1989 | int err = 0; |
734366de | 1990 | |
b2e1b302 LR |
1991 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
1992 | if (IS_ERR(reg_pdev)) | |
1993 | return PTR_ERR(reg_pdev); | |
734366de | 1994 | |
fe33eb39 | 1995 | spin_lock_init(®_requests_lock); |
e38f8a7a | 1996 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 1997 | |
a3d2eaf0 | 1998 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 1999 | |
09d989d1 LR |
2000 | user_alpha2[0] = '9'; |
2001 | user_alpha2[1] = '7'; | |
2002 | ||
ae9e4b0d LR |
2003 | /* We always try to get an update for the static regdomain */ |
2004 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); | |
ba25c141 | 2005 | if (err) { |
bcf4f99b LR |
2006 | if (err == -ENOMEM) |
2007 | return err; | |
2008 | /* | |
2009 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2010 | * memory which is handled and propagated appropriately above | |
2011 | * but it can also fail during a netlink_broadcast() or during | |
2012 | * early boot for call_usermodehelper(). For now treat these | |
2013 | * errors as non-fatal. | |
2014 | */ | |
2015 | printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " | |
2016 | "to call CRDA during init"); | |
2017 | #ifdef CONFIG_CFG80211_REG_DEBUG | |
2018 | /* We want to find out exactly why when debugging */ | |
2019 | WARN_ON(err); | |
734366de | 2020 | #endif |
bcf4f99b | 2021 | } |
734366de | 2022 | |
ae9e4b0d LR |
2023 | /* |
2024 | * Finally, if the user set the module parameter treat it | |
2025 | * as a user hint. | |
2026 | */ | |
2027 | if (!is_world_regdom(ieee80211_regdom)) | |
2028 | regulatory_hint_user(ieee80211_regdom); | |
2029 | ||
b2e1b302 LR |
2030 | return 0; |
2031 | } | |
2032 | ||
2fcc9f73 | 2033 | void /* __init_or_exit */ regulatory_exit(void) |
b2e1b302 | 2034 | { |
fe33eb39 | 2035 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2036 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2037 | |
2038 | cancel_work_sync(®_work); | |
2039 | ||
a1794390 | 2040 | mutex_lock(&cfg80211_mutex); |
abc7381b | 2041 | mutex_lock(®_mutex); |
734366de | 2042 | |
b2e1b302 | 2043 | reset_regdomains(); |
734366de | 2044 | |
f6037d09 JB |
2045 | kfree(last_request); |
2046 | ||
b2e1b302 | 2047 | platform_device_unregister(reg_pdev); |
734366de | 2048 | |
e38f8a7a LR |
2049 | spin_lock_bh(®_pending_beacons_lock); |
2050 | if (!list_empty(®_pending_beacons)) { | |
2051 | list_for_each_entry_safe(reg_beacon, btmp, | |
2052 | ®_pending_beacons, list) { | |
2053 | list_del(®_beacon->list); | |
2054 | kfree(reg_beacon); | |
2055 | } | |
2056 | } | |
2057 | spin_unlock_bh(®_pending_beacons_lock); | |
2058 | ||
2059 | if (!list_empty(®_beacon_list)) { | |
2060 | list_for_each_entry_safe(reg_beacon, btmp, | |
2061 | ®_beacon_list, list) { | |
2062 | list_del(®_beacon->list); | |
2063 | kfree(reg_beacon); | |
2064 | } | |
2065 | } | |
2066 | ||
fe33eb39 LR |
2067 | spin_lock(®_requests_lock); |
2068 | if (!list_empty(®_requests_list)) { | |
2069 | list_for_each_entry_safe(reg_request, tmp, | |
2070 | ®_requests_list, list) { | |
2071 | list_del(®_request->list); | |
2072 | kfree(reg_request); | |
2073 | } | |
2074 | } | |
2075 | spin_unlock(®_requests_lock); | |
2076 | ||
abc7381b | 2077 | mutex_unlock(®_mutex); |
a1794390 | 2078 | mutex_unlock(&cfg80211_mutex); |
8318d78a | 2079 | } |